In this psychological thriller directed by Jaume Balagueró, the story unfolds in a seemingly ordinary apartment building in Barcelona, where the concierge harbors a dark obsession with one of the residents. The film stars Luis Tosar, who delivers a chilling performance as the concierge, and Marta Etura as the unsuspecting tenant. The tension builds as the concierge’s sinister intentions become increasingly apparent, creating a gripping atmosphere of suspense. This film is a masterclass in building psychological tension and can be viewed on 123Movies / Movies123 for free.